Banks are highly regulated entities. Post 2009 they are almost required to track their employees by law. The government wants to know whether their employees ar

Banks are highly regulated entities. Post 2009 they are almost required to track their employees by law. The government wants to know whether their employees are breaking the firewall between the sell and buy sides, it wants to know whether they are doing insider trading, etc. Even if JP Morgan did not want to track their employees at all, they would still be tracking them because they're legally required to (most regulation isn't "track your employees"...it's more like "you must ensure your employees in these 2 divisions are not communicating with each other"). And since they've setup the infrastructure anyways it's inevitable they will also use it for their own uses and try and use some of the cost for their benefit.